Ventilating system.



No. 878,278.' PATBNTED FEB. 4, 1908'.

P. J. coNRoY.

VENTILATING SYSTEM. APPLICATION FILED 00T. 11,1905.

@Vi/lineman PATRICK J. CONROY, OF NEW YORK, N. Y., ASSIGNOR TO INTERNATIONAL SljllWn & 'll'N l f.

`VENTILATINGr COMPANY, OF NEW YORK, N. Y?, A CORPORATION (l l" l\` l^`.\\' YORK.

VENTILATING SYSTEM.

Specification of Letters Patent.

, Patented Feb.4,19os.

Application filed October 1l. 1905. Serial No. 282,243. i

" ranean passages, such as sub-railways, mines f without complete success.

and the like, but suchAmeans may also be applied to other inclosures.

Owing to the damp atmospheric conditions in under-ground )assafres it has been found that foul air is he d in Iarge volume andinot ermitted to esca e. Many devices have een applied to re ieve such conditions but Exhaust fans have been employedforthis pur ose, but

they have not been powerful enoug to thoroughly withdraw the foul air therefrom. Such fans have the effect of purifying such passages only for a very limited space, be.

yond which i Ae foul-atmosphere tenaciously clings to the damp walls and floors and forms a deep Stratum therein. The effect of this is that the part of a subway whose atmosphere should be purest -is the part that is foulest, the stratum of foul air being thick enough to enter cars and stations and causing great discomfort to passengers and occupants.

In the present system of Ventilating subterranean passages I have provided a blower preferably operated by an electric motor, which blower is connectedto aconduit leading from the open air and extending to a point in the subway between stations. From the next station is a similar conduit and means to draw air thereinto and to discharge the same therefrom, the discharge end of this conduit extending to a point between the subway stations and preferably extending beyond the vdischarge end of the first dcscribcd conduit so that air forced from one conduit does notl interfere with air forced from the other conduit. The discharge ends of the` conduits, now'ever, need not necessarily overlap in order to give this result, the

i effect depending upon the distance of the discharge endsu from each other. In the drawings accomoanving this speel- 'fcation, I have sought to illustrate what l 110W believe to bo the bcs,` cnibodinicnt oll this invention.

Figure 1 is a loi'ig'itudinrl vicw of a subterraneanrailway containing mysysl cm; and Fig. I2 is a transverse scction ol thc sanic taken through a station.

In Fig. l of the drawings I have shown three stations, from each ol' which are two conduits extendingfiii opposite directions.y

Taking the middle station and the one on thc right hand side for description, A represents a subway, B B, are; entrance hoods to the subway; l; represent. r funncl-shapcd air rcceptacle connectingwilh the conduits t t, which conduits extend down into thc subway to the discharge v`points c c; which arc shown to extend beyond cach other. Intermediate the air entramos l) b and thc discharge ends c c are the conduits or blowers,

I) I) which draw from the open air and discharge into the subway, the position of the discharge ends being such that thc convergent drafts of air do not interfere with cach othcrs flow'. This blower ma)v bc nmdc in any suitable form and operated in an)v suitable manncr. In the drawings `l liavc shown a blower operated by an electric motor IC IC, the power for which is supplied from thc third rail F, the circuit being completed through the switch Il, which is situated in any convenient place such as the ticket ollicc.

A switchboard in aj central station may bc wired in any well known way to control the switchboards of all of the stations along the line so that the coignplcto systcm cnn be operated from one common center.

While in thedrawings only two conduits are shown to lead from cach station and those in opposite directions, it is obvious that any number of conduits may bclaid to extend in eitlicr or both directions and that the airmay be drawn into the sameand forced therefrom by means of a single blower or a plurality of blowers. Again, the systcni can be operated between stations through oneconduit,l the discharge end of which in such case wouldbe ico the like into the conduits andthereby throwing out of o eration the blower.

What I. c aiin as new is.

1. ln Ventilating systems for subways, a pair of air conduits extending from the open air into under-ground passages, the discharge ends of such conduits extending beyond eachv other and means for drawing -air from the outside atmosphere into the conduits and discharging the saine into the subterranean the discharge ends of such conduits extend-` I ing beyond each other, and means for drawing air into such conduits from the outside atmosphere and discharging the same into such under-ground passage.

3. In Ventilating systems, a pair of air conduits, extending from the open air into an under-ground passage, the discharge ends of.

such conduits discharging in opposite direc.- tions into the subway, their relative position being such that the discharge from one conduit will not interfere withv the discharge from the other, and means for drawing air from the outside'atniosphere into such underground passages.

PATRICK J. CONROY.

Witnesses:

JOSEPH J. COLLINS,

JEssIE B. KAY. 

